public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(
root,
context.Span,
out SyntaxNode node,
predicate: f => f.IsKind(
SyntaxKind.TrueLiteralExpression,
SyntaxKind.EqualsExpression,
SyntaxKind.NotEqualsExpression,
SyntaxKind.LogicalAndExpression,
SyntaxKind.LogicalOrExpression)))
{
return;
}
switch (node.Kind())
{
case SyntaxKind.TrueLiteralExpression:
{
RegisterCodeFix(
context,
node.ToString(),
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
(ForStatementSyntax)node.Parent,
cancellationToken));
});
break;
}
case SyntaxKind.EqualsExpression:
case SyntaxKind.NotEqualsExpression:
case SyntaxKind.LogicalAndExpression:
case SyntaxKind.LogicalOrExpression:
{
var binaryExpression = (BinaryExpressionSyntax)node;
TextSpan span = RemoveRedundantBooleanLiteralAnalysis.GetSpanToRemove(binaryExpression, binaryExpression.Left, binaryExpression.Right);
RegisterCodeFix(
context,
binaryExpression.ToString(span),
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
binaryExpression,
cancellationToken));
});
break;
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
LiteralExpressionSyntax literalExpression = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <LiteralExpressionSyntax>();
Debug.Assert(literalExpression != null, $"{nameof(literalExpression)} is null");
if (literalExpression == null)
{
return;
}
Debug.Assert(literalExpression.IsBooleanLiteralExpression(), literalExpression.Kind().ToString());
if (!literalExpression.IsBooleanLiteralExpression())
{
return;
}
SyntaxNode parent = literalExpression.Parent;
switch (parent?.Kind())
{
case SyntaxKind.ForStatement:
{
RegisterCodeFix(
context,
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
(ForStatementSyntax)parent,
cancellationToken));
});
break;
}
case SyntaxKind.LogicalAndExpression:
case SyntaxKind.LogicalOrExpression:
case SyntaxKind.EqualsExpression:
case SyntaxKind.NotEqualsExpression:
{
RegisterCodeFix(
context,
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
(BinaryExpressionSyntax)parent,
cancellationToken));
});
break;
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
SyntaxNode node = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf(f => f.IsKind(
SyntaxKind.TrueLiteralExpression,
SyntaxKind.EqualsExpression,
SyntaxKind.NotEqualsExpression,
SyntaxKind.LogicalAndExpression,
SyntaxKind.LogicalOrExpression));
Debug.Assert(node != null, $"{nameof(node)} is null");
if (node == null)
{
return;
}
switch (node.Kind())
{
case SyntaxKind.TrueLiteralExpression:
{
RegisterCodeFix(
context,
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
(ForStatementSyntax)node.Parent,
cancellationToken));
});
break;
}
case SyntaxKind.EqualsExpression:
case SyntaxKind.NotEqualsExpression:
case SyntaxKind.LogicalAndExpression:
case SyntaxKind.LogicalOrExpression:
{
RegisterCodeFix(
context,
cancellationToken =>
{
return(RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(
context.Document,
(BinaryExpressionSyntax)node,
cancellationToken));
});
break;
}
}
}
private static void AnalyzeLogicalAndLogicalOr(
SyntaxNodeAnalysisContext context,
BinaryExpressionSyntax binaryExpression,
ExpressionSyntax left,
ExpressionSyntax right,
SyntaxKind kind)
{
if (left.IsKind(kind) ||
right.IsKind(kind))
{
RemoveRedundantBooleanLiteralRefactoring.ReportDiagnostic(context, binaryExpression, left, right);
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
BinaryExpressionSyntax binaryExpression = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <BinaryExpressionSyntax>();
if (binaryExpression == null)
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.RemoveRedundantBooleanLiteral:
{
CodeAction codeAction = CodeAction.Create(
"Remove redundant boolean literal",
cancellationToken => RemoveRedundantBooleanLiteralRefactoring.RefactorAsync(context.Document, binaryExpression, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.SimplifyBooleanComparison:
{
CodeAction codeAction = CodeAction.Create(
"Simplify boolean comparison",
cancellationToken => SimplifyBooleanComparisonRefactoring.RefactorAsync(context.Document, binaryExpression, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseAnyMethodInsteadOfCountMethod:
{
UseAnyMethodInsteadOfCountMethodCodeFix.Register(context, diagnostic, binaryExpression);
break;
}
}
}
}
private static void AnalyzeEqualsNotEquals(
SyntaxNodeAnalysisContext context,
BinaryExpressionSyntax binaryExpression,
ExpressionSyntax left,
ExpressionSyntax right,
SyntaxKind kind,
SyntaxKind kind2)
{
SyntaxKind leftKind = left.Kind();
if (leftKind == kind)
{
if (IsBooleanExpressionButNotBooleanLiteral(context, right))
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression);
}
}
else if (leftKind == kind2)
{
if (IsBooleanExpressionButNotBooleanLiteral(context, right))
{
RemoveRedundantBooleanLiteralRefactoring.ReportDiagnostic(context, binaryExpression, left);
}
}
else
{
SyntaxKind rightKind = right.Kind();
if (rightKind == kind)
{
if (IsBooleanExpressionButNotBooleanLiteral(context, left))
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression);
}
}
else if (rightKind == kind2)
{
if (IsBooleanExpressionButNotBooleanLiteral(context, left))
{
RemoveRedundantBooleanLiteralRefactoring.ReportDiagnostic(context, binaryExpression, right);
}
}
}
}
private static void AnalyzeEqualsNotEquals(
SyntaxNodeAnalysisContext context,
BinaryExpressionSyntax binaryExpression,
ExpressionSyntax left,
ExpressionSyntax right,
SyntaxKind kind,
SyntaxKind kind2)
{
SyntaxKind leftKind = left.Kind();
if (leftKind == kind)
{
switch (AnalyzeExpression(right, context.SemanticModel, context.CancellationToken))
{
case AnalysisResult.Boolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: true);
break;
}
case AnalysisResult.LogicalNotWithNullableBoolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: false);
break;
}
}
}
else if (leftKind == kind2)
{
switch (AnalyzeExpression(right, context.SemanticModel, context.CancellationToken))
{
case AnalysisResult.Boolean:
{
RemoveRedundantBooleanLiteralRefactoring.
ReportDiagnostic(context, binaryExpression, left, right, left);
break;
}
case AnalysisResult.LogicalNotWithNullableBoolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: false);
break;
}
}
}
else
{
SyntaxKind rightKind = right.Kind();
if (rightKind == kind)
{
switch (AnalyzeExpression(left, context.SemanticModel, context.CancellationToken))
{
case AnalysisResult.Boolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: true);
break;
}
case AnalysisResult.LogicalNotWithNullableBoolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: false);
break;
}
}
}
else if (rightKind == kind2)
{
switch (AnalyzeExpression(left, context.SemanticModel, context.CancellationToken))
{
case AnalysisResult.Boolean:
{
RemoveRedundantBooleanLiteralRefactoring.ReportDiagnostic(context, binaryExpression, left, right, right);
break;
}
case AnalysisResult.LogicalNotWithNullableBoolean:
{
SimplifyBooleanComparisonRefactoring.ReportDiagnostic(context, binaryExpression, left, right, fadeOut: false);
break;
}
}
}
}
}
